<html>

<head>
    <link rel="stylesheet" href="../normalize.css">
    <link rel="stylesheet" href="../index.css">
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>

<body>
    <!-- 只有在 `key` 是 `Enter` 时调用 `vm.submit()` -->
    <input v-on:keyup.enter="submit">
    <input v-on:keyup.page-down="onPageDown">
    <input v-on:keyup.13="submit">

</body>

<script type="text/javascript">
</script>

</html>